package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import io.swagger.models.auth.In;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

/**
 * @Author：XueShiHao
 * @Date：2025/6/20 星期五 14:57:12
 * @Email:747278007@qq.com
 * @Description:
 **/
@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 添加购物车
     * 1.购物车需要绑定用户的id
     * 2.判断绑定的是套餐还是菜品
     *
     * @param shoppingCartDTO
     */
    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //需要判断当前商品是否存在与购物车内
        List<ShoppingCart> shoppingCartList=shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList!=null&&shoppingCartList.size()>0){
            //如果存在数据
            shoppingCart=shoppingCartList.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber()+1);
            shoppingCartMapper.updateNumberById(shoppingCart);
        }else {
            //如果不存在
            Long dishId= shoppingCartDTO.getDishId();
            if(dishId!=null){
//                如果添加的是菜品
                Dish dish=dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            }
            else{
//                如果添加的是套餐
                Setmeal setmeal=setmealMapper.getById(shoppingCart.getSetmealId());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCart.setNumber(1);
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    /**
     * 查看购物车
     *
     * @return
     */
    @Override
    public List<ShoppingCart> showShoppingCart() {
        return shoppingCartMapper.list(ShoppingCart.builder().
                userId(BaseContext.getCurrentId())
                .build());
    }

    /**
     * 清空购物车商品
     */
    @Override
    public void cleanShoppingCart() {
 shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());
    }

    /**
     * 删除购物车中一个商品
     *
     * @param shoppingCartDTO
     */
    @Override
    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
ShoppingCart shoppingCart=new ShoppingCart();
BeanUtils.copyProperties(shoppingCartDTO ,shoppingCart);
List<ShoppingCart> shoppingCartList=shoppingCartMapper.list(shoppingCart);
if(shoppingCartList!=null&&shoppingCartList.size()>0){
    shoppingCart=shoppingCartList.get(0);
    Integer number = shoppingCart.getNumber();
    if(number==1){
        shoppingCartMapper.deleteById(shoppingCart.getId());
    }else{
        shoppingCart.setNumber(shoppingCart.getNumber()-1);
        shoppingCartMapper.updateNumberById(shoppingCart);
    }


}
    }
}
